Stove or furnace attachment.



10.850.1'71. PATBNTBD APR. 1e, 1907. L. D. MOHLBR.

' STOVE ORTURNACE ATTACHMENT. APPLIUAUONHLED un 11.1904.

LEVI D. MOI-ILER, -OF MCPHERSON, KANSAS.

STOVE OR FURNACE ATTACHMENT.

Specification of Letters Patent.

Patented April 1.6, 1907.

Application filed May 17. 1904. Serial No. 208,341.

To La7/Z whom it may concer-n,.-

Be it known that I, LEVI D. Moi-1mm, a citizen of the United States, and a resident of McPherson, in the county of McPherson and State of Kansas, have invented a new and Improved Stove or Furnace Attachment, of which the following is a full, clear, and exact description.

This invention relates particularly to improvements in devices designed to be arranged in any form of stove or furnace for burning slack and smoke.

The object of this invention is to provide an unfailing draft from the grate of a stove or furnace upward into and through the fuel, effectually preventing smothering of the re in the use of slack, coal-dust, or similar fuel; also, to conduct sufficient air above the fuel to carry away the surplus gas that may accumulate while the fire is starting or at times .when there is no flameabove the fuel, and thus prevent an explosion, and, further, to operate to deflect the air conducted above the fuel in a transverse direction across the top of the fire, with such clearance above the fuel as to employ said air for the combustion of gas and smoke generated in the combustion-chamber and in addition to hold the heat downward and to so spread the products of combustion against the sides of the combustionchamber as to increase the radiation of heat through the walls thereof into the air without, and vespecially to increase the radiation of heat from the lower part of the stove for the purpose of warming the floor.

I will describe a stove or furnace attachment embodying my invention and then point out the novel features in the appended claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figurev 1 is a sectional elevation on the line a: of Fig. 2, showing a stove or furnace attachment embodying my invention. Fig. 2 is a section on the line y y of Fig. 1. Fig. 3 is a top plan view of a deflector employed. Fig. 4 is a plan of a flue employed, showing a slight modification; and Fig. 5 is a section on vthe line z z of Fig. 4.

Referring to the drawings, 1 designates the fire-pot of a stove or furnace, 2 the grate therein, and 3 the shakinggrate. These gratcs, however, form no part of my present invention. Arranged removably in the firepot is a conductor-flue 4, which is so constructed and placed as to receive air through the grate and convey the air upward to pass it into and above the fuel, thus affording complete combustion. As here shown, the conductor 4 is semicircular in cross-section and is reduced in depth from the bottom upward. It is also shown as engaging its edges at the open side against the inner surface of the Afire-pot, and thus the fire-pot forms one wall of the conductor. It is to be understood, however, that the conductor may be closed on all sides.

At its front the conductor is provided with air-openings 5, and similar openings 6 are formed at the sides. An upward extension 7 on the conductor is connected to a bracket 8,

the vertical leg portion 9 of which rests upon the interior annular shoulder or top 10 of the fire-pot, and the horizontally-disposed portion of this bracket supports a deiiector-plate 11, which extends partly across the fire-pot, the opening being at the side where the door 12 is placed, thus permitting of passing coal through the door and freely into the fire-pot. As a further means of support the deflector 11 is provided with opposite legs 13, which rest upon the said shoulder 10.

In Figs. 4 and 5 the conductor 4a is shown as provided at its upper end with segmental braces 14, which may engage against the inner surface of the lire-pot and hold the conductor in place. In this instance the deflectcr may be dispensed with and the' conductor rest upon the grate or slightly above the same, and in this modification it will be noted that the conductor is closed at all sides as the preferred construction.

While I have shown and described one shape of conductor, it is to be understood that as it is designed to be used in connection with -stoves and furnaces already made the shape and size must be varied to suit the conditions, and therefore I do not limit my invention in this respect.

On account of the great heat to which the conductor is subjected it is desirable to make it of very heavy'casting or of fire-clay, tile,

Aor other material having great heat-endurin qualities. It may be here stated that it wil be preferable in very large stoves or furnaces to employ a conductor closed on all sides, as indicated in Figs. 4 and 5; .but in smaller stoves in order to save space the wall of the conductor next tothe fire-pot may be IIO omitted, employing the inner surface of the fire-pot for the purpose, as in Figs. 1 and 2.

ln the operation atmospheric air Will pass through the grate into the conductor, and a portion thereof will pass out through the openings 5 and 6 but the greater ortion Will passthrough the open upper en and be de- 'liected across the fuel by the plate l 1 thus consuming all gases and smoke given off from the fuel. will direct the air to the center ofthe fuel, While the air passing out througlii the openings 6 will travel around the edge of the fuel and Will afford outlet for the fire in case it is entirely covered with fuel of the nature of slack or coal-dust, and thus prevent s1 nothere ing of the fire. This movement of the aircurrent will create a suction to draw the smoke and gases to the upper end of the conductor to travel, mixed with the heated air, beneath the dei'lector close to the fuel and create great heat, whereby all the combustible elements rising from the fuel are consumed. rllhe position of the deflector-plate directly over the fire deflects downward', the heat striking its under surface, which intensifies the heat in the fuel-pot and increases the radiation through the walls thereof to more effectually Warm the fioor and lower air of the room.

Having thus described my invention, I claim as new and desire to secure by Letters Patentl. A slack and smoke burner attachment for stoves or furnaces comprising aconductor having an open side, the edges of which are adapted to engage loosely against the inner side of a fire-pot which forms a wall for the open side of the conductor, the said conductor being of such form` in cross-'section as to produce a lining for a portion of the fire-pot but so spaced from the fire-pot as to form an air- The openings 5, it Will be noted,

passage between thefconductor and fire-pot, and a deilector over the conductor adapted to convey air horizontally over the fuel.

2. A slack and smoke burning attachment for stoves or furnaces, comprising a conductor open at its ends and having air-outlet openings, the said flue being adapted to be removably placed in the fireepot of the stove or furnace, and a'deilector attached to the up per end of the flue and extended partly across the fire-pot.

3. A slack and smoke burning attachment for stoves or furnaces, comprising a -conductor having an open side, the edges of which a'reiadapted to engage the inner side of a fire-pot which forms a Wall for the open side of the conductor, the said conductor being of such shape in cross-section as to co.

operate with the inner side of the fire-pot as to form a passage to convey air upward into and above the fuel, and a horizontally-disposed dellector-plate attached to the upper end of the conductor.

4. A smoke and slack burning attachment for a stove or furnace comprising a conductor adapted to rest against the inner surface of a fire-pot, the said conductor being open at its ends and provided with aireoutlets, an upward extension on said conductor, a bracket to which said extension is attached, the said bracket having a portion for resting upon the upper edge of the fire-pot, a horizontallydisposed deflector-plate attached to said bracket, and legs on said plate for resting on the upper edge of the ireot.

In testimony whereof have signed my name to this specification in the presenceof two subscribing witnesses.

LEVI D. MOHLER.

Witnesses:

W. E. GREGORY, MARY BALDWIN. 

